Table 4 Ranges of yearly average concentrations of COD in the effluent of the WWTP [12]
FDM subsector | Yearly average COD concentration (mg/l) | ||
|---|---|---|---|
Direct discharge | Indirect discharge | Landspreading | |
Animal feed | 19–155 | 778–8890 | NI |
Brewing | 16–85 | 111–5779 | NI |
Dairies | 8–147 | 40–4475 | 20.1–1001 |
Ethanol production | 41–65 | NI | NI |
Fish and shellfish processing | NI | 5741 | NI |
Fruit and vegetables | 13–187 | 2319 | 2205–5402 |
Grain milling | NI | NI | NI |
Meat processing | 22–259 | 406–3800 | 1692 |
Oilseed processing and vegetable oil refining | 15–363 | 53–5561 | NI |
Olive oil processing and refining | NI | 53–645 | NI |
Soft drinks and nectar/juice | 6–78 | 1537–3253 | 3322 |
Starch production | 31–284 | 76.25 | 513–11,333 |
Sugar manufacturing | 22–132 | 4675 | 5556 |
All FDM subsectors | 6–363 | 40–8890 | 20.1–11,333 |